The machete and the freighter -- Monte -- Making the Panama Canal Watershed -- Frank Robinson's map -- Life along the river (Miocene-1903) -- Hydropolitics, territory, and canal construction -- Pueblos perdidos or how the lake ate the river -- Banana republic? The agricultural possibilities of the Canal Zone -- Getting across and getting around -- The highway : the world united, Panama divided -- Conquest of the jungle : the moral economy of rural infrastructure -- Weeds -- A demanding environment.